Overview: Few pathologie phenomena, as shock, can originate from so many causes and involve so many complex physiologie mechanisms: The complexity of the phenomenon, thus, has resulted in extensive study and raised many uncertainties. Different conditions, such as hemorrhage, trauma, burns, bacterial infection, and anaphylaxis, can cause a shock state which initiates a chain of biochemical events that tends to maintain the shock. Recent progress in bio chemistry, physiology, and pharmacology has tended to clarify this chain of events, and elucidate the possible trigger mechanism. Besides the
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